Harness-operated stop-motion device for looms



April 3, 1928.

J. MAGINA HARNESS OPERATED STOP MOTION DEvIcE FOR LOOMS Filed May 31. 1927 Y INVENTOR J0/40 I74 67/144 I Z Arman Patented Apr. 3, 1 928. i i

" U IT STATES PATENT :QFF E on0 niacin-A, or nnwrnnronn, AssAcnUsE'rrs."

Mia-new ma siror-raorron nnvIcEronLooMs;

- Application filed May 31,

' edge than on the other, permittingthe warp threads at the low side to remain in the path of theshuttle'which carries the weft threads through the open warp shed, resulting in broken warp threads or ends referred to in the trade as smashes. 1 Slackness of the harness'straps will also cause loose woven fabric and fabric'having some of the warp threads floating onthe under side of the fabric due'to the fa'ct that they were not raisedto-a'proper level to be woven'into' the fabric. This condition may "exist for a considerable length oftimeand the weaver would not be aware of the fact, 1

The principal object ofmy invention is to prevent such conditions by {automatically stopping theloom immediately upon-any one of the harness members becoming slack, which may be caused by a'broken or'strained supporting strap or wire or anyone of'a number of different" causes well known in the art of weaving; l

Other objects and advantages will'appear i from the detailed description which follows. I attainlth-ese objects and advantages by means of the mechanismdescribed in the accompanying drawings wherein:

Figure 1 is a rear elevational view show.- ing sufiicientloom structure to illustrate the mode of attachment of the harness operated stop motion. 1

Figure 2 is a cross sectional view through the loom showing the harness operated stop motion in clearer view.

Referring to the drawing, only suflicient loom structure is shown to illustrate the application of the device. The harness 'members 1 are shown suspended by straps 2 from a series of sheaves 3 there being an individual sheave for each harness member. The sheaves are loosely mounted on a shaft at held with the loom arches 5. Disposed in front of the harnesses is the lay 6, the reel 7 the hand rail 8 and the lay sword 9 which pivotally mounted at its lower end (not shown). The warp threads 10 pass through 1927. Serial No. 195,411.

the eyelets'in the-harnesses and formthe shed by being carried up and down in the usual way;

7 In Figure 2, my attachment is shown as comprising suspension rods 11,12, of which there isa pair onzeach sideof the loom,

' which are secured by. their "hooked ends to the front and rear arches 5 of the loom through. the openings 13in the loom arches 5. A lever 14 having a sufficient curvature to clear the hand rail 8- is pivotally secured to the lower'extremityof the front rod 11 and extends longitudinally. of'the loom=as far back as the warp stop motion; The rear suspension rod. 12'is located adjacent the" innermostharness member. A sensitive helical' spring 15 is secured to the-lower extremity ofthe rod12 by a collar16, and set screw. Atthe lower end of 'the spring there is provided an eye-member .17 through whic j the lever rod '14 passes.

At the free end of. the lever rod a drop device is attached. Asshown in the drawings it consists of a flat strip l8having a head portion 19 at right angles thereto for attachment on the'leverrod. The fl'atxstrip has a tapered slot 20 therein for enclosing the normally vmoving part 21 of the warp stop motion device. Thewarp-stop motion is not shown'in detail. as its mode of operation'is familiar to anyone skilled, in the art.

The element 21 oscillates as on the Crompton and Knowles warp stop motion and the lower portion of the tapered slot ofthe drop member above. referred to is" of sufficient size I "to allow the free-normal movement'of the 7 element21; whereas the narrow portion of the slot is of such width as to hug the oscillating element and restrain its movement.

The mode of operation is as follows: In

the event that a harness becomes broken or unduly slack the impact of the harness on the lever rod causes it to fall and this descent is cushioned by the spring. The drop dcrice slides down on the moving part of the warp stop motion and as the narrow end of the tapered slot is approached the moving part is held against movement whereby the loom is brought to a stop. The position of the drop means when lowered is shown by the dotted lines in Figure 2.

Although the drop device shown depends upon a tapered slot for its efi'ect it should be understood that the drop device may be made serviceable with any type of stop motion by simply suspendingthe drop device over. the

moving part and'its'drop on the moving or rocking part will stop the loom. The drop device may be used suspended over the stop motion controlas'woiild'bethe case with the old types of stop motions whenthe taperedslot would be of no value. With. the modern type of stop motion Where'the wiresor rods have a square cross section the functlon of a tapered slot enclosing one ofthe' wires or rods has been pointed out-above.

All that has been said above in the descriptio'n of 3 my preferred embodiment ismffe'red byway of illustration and notlimitation. :I

do not wishto be limited-tothe exact stru'c spirit and scop'e-ofthe following claims.

The inventionhasving been set "forth, what is claimed as new'and'useful is:

1. Ar-harness-operated stoprnotionfor use in combii'iati'o'n Witlrthe warp stop motionof a loom, comprising means suspended e-from "said 100m "and disposed transversely within the harness members, "a drop mem-be'1'--atfltached to said means and being "adapted when lowered ofcoatting with a normally movm'g part of the warp stop motion to "automatically stop the loom, said drop rnemher being substantially O-sl'laped and having taperedslot therein,'-saidtapered" slot being adapted to freely inclose thenormally moving; part of' the'warp stop motionduri-ng the" normal operation of'a 106111.

.1 2. A harness'operated stopmotionfor use v in combination with the warp stop motion" of a loom, comprismg'means suspended from "said 'loo'm and disposedtransversely of the :harness members, "a drop means attached to said first mentioned means, asaiddrop means havinga tapered slot therein to freely-accommodate the normally moving'part of the warp stop motion at its Wider end, its narrow endcbeing adapted upon the breaking of a harness of imgging said normally moving part to stop the loom.

' 3. In a .loom, harness 'members, a warp stop-motion, "frontal and rear'suspension rods hooked. to the arches of the loom on each 'side'thereof, forwardly andrearwardly of the harness members, a lever-rod curved upwardly-at one end ispivotally secured to the extremities of the frontal suspension rods, a sensitive resilient meansattaehed'to theextremities of the-rear-suspension rods, said lever rod :being: secured to I thelower end of said-resilient means whereby it is resiliently suspended, at substantially IO-shaped drop means having a tapered slot therein secured to said leverrod at a; point adjacent itsfree' end, said -O-shaped-"dropmeans being adapt ed in" raised-- positionto vfreely enclose the normally-moving; part of the -,\va1"p stop mo- .tion and inlow'veredposition to prevent-its movement.

4. In a loom,--the combination, with the harnessespanda warp stop motion to automatically stop theloom uponthe b kag ofa warp thread," of means passing" through said harnesses, said means being suspended from said'loom and being adaptedfto coaet with'a normally; moving part of said war-p stop motion to-automatieally stop the-loom upon the falling of -a harness upon a portion of said means, said means comprisingfrontal and rear suspension rods,; a lever rod-pivotally connected to said frontal rods, said lever rodbeing resiliently connectedto said rear suspensionrods, and drop -means at the extreniityrof said-lever rod for engagmgthe warp stop motion upon the depression of the lever rod.

Signedat Fall Rivenixnthe county of "Bristol; State of'Massa'chusetts, this twenty- 

